U.S. patent number 3,844,443 [Application Number 05/342,497] was granted by the patent office on 1974-10-29 for easy-open container and method of making same.
This patent grant is currently assigned to Reynolds Metals Company. Invention is credited to Daniel F. Cudzik.
United States Patent |
3,844,443 |
Cudzik |
October 29, 1974 |
EASY-OPEN CONTAINER AND METHOD OF MAKING SAME
Abstract
An easy-open container and method of making same is provided
wherein such container has a container body which has a top right
circular cylindrical portion which has a plurality of angularly
spaced apart thread segments. A quick-release cap is provided and
has a cooperating plurality of angularly spaced apart thread
segments in perfect threaded engagement with the thread segments of
the top portion and an axially compressed resilient sealing means
is provided between the cap and the cylindrical portion.
Inventors: |
Cudzik; Daniel F. (Richmond,
VA) |
Assignee: |
Reynolds Metals Company
(Richmond, VA)
|
Family
ID: |
23342087 |
Appl.
No.: |
05/342,497 |
Filed: |
March 19, 1973 |
Current U.S.
Class: |
220/296; 215/337;
220/304 |
Current CPC
Class: |
B65D
41/0442 (20130101) |
Current International
Class: |
B65D
41/04 (20060101); B65d 041/06 () |
Field of
Search: |
;215/337,332,329,217,222,357 ;220/40 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Price; William I.
Assistant Examiner: Hart; Ro E.
Claims
What is claimed is:
1. An easy-open container comprising, a container body having a top
right circular cylindrical portion, a plurality of angularly spaced
apart thread segments on said top portion, a cap having a
cooperating plurality of angularly spaced apart thread segments in
threaded engagement with said thread segments of said top portion,
each of said thread segments of said cylindrical portion being
surrounded above and below by parts of said cap defining an
associated thread segment of said cap so that said thread segments
of said cylindrical portion and said cap are in substantially
perfect threaded engagement throughout due to having been made
simultaneously, and axially compressed resilient sealing means
between said container cap and cylindrical portion.
2. A container as set forth in claim 1 in which said cap and top
portion are made of a metallic material.
3. A container as set forth in claim 1 in which said thread
segments are helical thread segments and said sealing means is
bonded to said cap and enables resealing of said cap upon removal
and reinstallation thereof.
4. A container as set forth in claim 3 in which said top portion
has an inwardly turned bead-like flange and said sealing means is
urged against said bead-like flange.
5. A container as set forth in claim 3 in which said sealing means
is a plastisol.
6. A container as set forth in claim 3 in which said plurality of
angularly spaced apart thread segments consist of a plurality of
six thread segments and each thread segment extends through an
angle of 30.degree. and each end thereof is spaced 30.degree. from
an adjacent thread segment.
7. A container as set forth in claim 3 in which said cap has a
plurality of angularly spaced apart bulged portions therein
corresponding in number to said plurality of thread segments of
said top portion, said bulged portions being adapted to be rotated
in alignment over thread segments projecting outwardly from said
right circular cylindrical portion to enable removal of said cap
from said right circular cylindrical portion.
8. A container as set forth in claim 3 in which said container body
comprises a cylindrical main portion and a frustoconical transition
portion extending between said main portion and said top right
circular cylindrical portion with said portions being made as a
single unit and having a substantially uniform thickness
throughout.
9. A container as set forth in claim 8 and further comprising a
bottom wall fixed to the bottom edge portion of said main portion
with said bottom wall having a substantially uniform thickness
throughout.
10. A container as set forth in claim 9 in which said container
body, cap and bottom wall are made of a metallic material
containing aluminum and have a substantially uniform thickness.
11. A container as set forth in claim 10 in which said bottom wall
is attached to said main body portion by a mechanically swaged
circumferential bead arranged within the peripheral outline of said
main body portion.
Description
BACKGROUND OF THE INVENTION
There are numerous easy-open containers in current use which have
reclosable closure caps. In general, these containers are
comparatively expensive to manufacture and often use an excessive
amount of material in order to provide a vessel capable of
containing products, such as a carbonated beverage, for example, at
pressures greater than ambient.
To provide greater structural integrity therefor some of these
present containers have single piece bottoms and side walls wherein
the side walls are seamless walls. Usually each of these present
containers which has a single-piece side wall and bottom wall is
made from a sheet metal blank by drawing and ironing the metal
arranged concentrically around a bottom-wall defining central
portion and inherently the bottom wall of the final container has
an excessive thickness which increases the overall cost of the
container unnecessarily.
SUMMARY
This invention provides an improved easy-open container and method
of making same wherein such container is of simple construction,
has optimum structural integrity and is economical to build because
it uses a minimum amount of material. The container comprises a
container body having a top right circular cylindrical portion and
a plurality of angularly spaced apart thread segments on the right
circular cylindrical portion with a quick-release cap being
provided and having a cooperating plurality of angularly spaced
apart segments in perfect threaded engagement with the thread
segments of the top portion and such cap has an axially
compressible resilient sealing means between the cap and the
cylindrical portion.
Other details, uses, and advantages of this invention will be
readily apparent from the embodiments thereof presented in the
following specification, claims, and drawing.
BRIEF DESCRIPTION OF THE DRAWING
The accompanying drawing shows a present preferred embodiment of
this invention, in which
FIG. 1 is a view in elevation with parts in cross section and parts
broken away illustrating one exemplary embodiment of the container
of this invention;
FIG. 2 is a top plan view of the container of FIG. 1;
Fig. 3 is a fragmentary view in elevation of the upper portion of
the container of FIG. 1 and showing the closure cap therefor
positioned in exploded relation above such container;
FIG. 4 is an enlarged fragmentary cross-sectional view of the top
portion of the container of FIG. 1 taken essentially on the line
4--4 of FIG. 2; and
FIG. 5 is a schematic presentation illustrating a series of method
steps which may be employed to make, fill with a product, and close
the container of FIG. 1.
DESCRIPTION OF ILLUSTRATED EMBODIMENTS
Reference is now made to FIG. 1 of the drawing which illustrates
one exemplary embodiment of a container of this invention which has
a quick-release resealable cover cap and such container is
designated generally by the reference numeral 10. The reclosable
container 10 is particularly adapted to contain a product such as a
product under pressure and in this example the container 10 is
presented as containing a consumable product in the form of a
carbonated beverage which is designated generally by the reference
letter B.
The container 10 comprises a container body which is designated
generally by the reference numeral 11 and such body has a right
circular cylindrical main part 12 and a right circular cylindrical
top portion 13 with the portions 12 and 13 being connected by a
frustoconical transition portion 14, see FIG. 4. The parts 12, 13
and 14 are made as a single unit and have a substantially uniform
thickness throughout. The main body 12 has a necked or reduced
diameter bottom portion 15 also of right circular cylindrical
configuration and a bottom wall 16 is fixed to the portion 15 in a
fluid-tight manner so that the container is capable of withstanding
comparatively high internal pressures.
The bottom wall 16 has a thickness which is preferably no greater
than the thickness of the container body 11 and hence its uniform
thickness portions 12-14 and wall 16 is fixed in position using
seaming or flanging equipment of the type commonly used in the art
to define a bottom chime or bead 17. The bead 17 is such that its
outer circumferential surface is within the maximum peripheral or
circumferential outline of the main body portion 12 and as
illustrated at 20 in FIG. 1.
As seen particularly in FIG. 3 the top portion 13 of body 11 has a
plurality of angularly spaced apart male helical thread segments
21; and, the container 10 has a quick-release resealable closure
cap 22. The cap has a cooperating plurality of angularly spaced
apart thread segments in the form of female thread segments 23 each
of which is in threaded engagement with an associated thread
segment 21 as shown at 24 in FIG. 4.
The container 10 also has an axially compressible sealing means 25
of approximately annular configuration and arcuate as viewed in
cross section. The sealing means 25 may be made of any suitable
compressible resilient material such as an elastomeric material, or
the like, so that with the cap 22 in threaded engagement over the
portion 13 of container body 11 the sealing means 25 provides a
fluid-tight seal.
The construction and the cooperating arrangement of the portion 13
of container 10 and the associated cap 22 are such that in the
event the entire contents of the container 10, such as a beverage
B, are not used after the cap 22 has been initially removed then
such cap may again be threaded into engagement over the top portion
13 to compress the sealing means 25 and again provide a fluid-tight
seal for container 10.
As seen particularly in FIGS. 1, 3 and 4 the cap 22 has a plurality
of angularly spaced bulged portions 26 therein which, as will be
apparent from FIG. 2, correspond in number to the plurality of male
helical thread segments 21 in the portion 13 and hence the same
plurality of thread segments 23 in the cap 22. The bulged portions
26 are provided in a tubular skirt 27 comprising the cap 22; and,
the skirt 27 extends downwardly from a recessed top portion 28 of
the cap and terminates in an annular bottom bead 29.
The cap 22 is in a fluid-tight sealed realtion when its helical
thread segments 23 are threadedly engaged with the helical thread
segments 21 of the right circular cylindrical portion 13 and the
threadedly engaged segments cause the compressible sealing means 25
to be axially compressed against a bead-like flange 30 of
substantially semi-toroidal configuration which defines the top of
the right circular cylindrical portion 13. The cap 22 is rotated
counterclockwise, as viewed in FIG. 2, relative to the container
body 11 until the bulged portions 26 are rotated into vertical
alignment with the helical thread segments 21 whereupon the cap 22
may be simply lifted vertically and removed from the container body
11.
Any desired number of helical thread segments 21 may be provided on
right circular cylindrical portion 13 with a corresponding number
of helical thread segments 23 being provided on the cap 22;
however, in this example, a plurality of 6 thread segments are
provided on portion 13 and cap 22. Each of the thread segments 21
on the top portion 13 extends through an angular distance or angle
of 30.degree. and each end of each thread segment 21 is spaced an
angular distance of 30.degree. from the near edge of its most
closely adjacent thread segment 21. The thread segments 23 in the
cap 22 are similarly arranged with the bulged portions 26 being
interposed between each closely adjacent pair of thread segments
23. With this arrangement the threaded cap 22 may be released
simply by rotating it through an angle of 30.degree. whereupon the
cooperating thread segments 23 are unthreaded from their associated
portions 21 and the bulged portions 26 are precisely aligned
thereover allowing the cap 22 to be lifted vertically away from the
container 10.
With the cap 22 in threaded engagement with the top portion 13 of
the container 10, the helical thread segments 21 and 23 are in
perfect threaded engagement throughout; and, this is due to the
fact that the thread segments 21 and 23 are made in a simultaneous
manner and as will be discussed in detail hereinafter in connection
with the method of this invention.
Having described the detailed construction of the container 10 and
its quick-release resealable cover cap 22 the detailed description
will now proceed with a description of method steps which may be
employed to define such container and cap and for this description
particular reference is now made to FIG. 5 of the drawing.
A workpiece, preferably in the form of a flat circular sheet-like
workpiece W made of a suitable metallic material is provided as
shown at location A and such workpiece may be suitably formed,
preferably by drawing and ironing, to define a container body which
for simplicity will be designated by the reference numeral 11
throughout its various stages of forming presented in FIG. 5 even
though the completed container body of container 10 is also
designated by the reference numeral 11. In addition, wherever
possible during the description of the method employed to form the
workpiece W and for easy correlation with the completed container
10, reference numerals which are identical to various component
portions of the completed container 10 will also be utilized for
the components of the container construction or body being
formed.
The container body 11 formed from workpiece W has a comparatively
large diameter main body portion 12, a right circular cylindrical
portion 13, and a frustoconical transition portion 14 as shown at
location B and a transverse wall 35 of substantial thickness
defines the terminal outermost end of the right circular
cylindrical portion 13. The construction shown at B may be defined
by one or more forming operations, such as, drawing and ironing
operations, for example.
The central portion of the transverse wall 35 is then severed using
any suitable severing or cutting means and removed as shown at
location C so that the body 11 has an inwardly directed flange
means or annular flange 37. In addition, in applications, such as
this, where it is desired to define the container 10 having a
reduced diameter or necked-in portion at the opposite end of its
main portion 12 for attachment of a bottom wall having a
corresponding reduced diameter, a portion 15 is also formed in the
container body.
The container body 11 is then suitably reformed as shown at
location D and the inwardly directed flange means of flange 37 is
formed into a bead-like configuration or bead 30.
A cap structure is suitably made as illustrated at E with such cap
structure having a tubular wall or skirt 27 extending downwardly
from a recessed top portion 28 and the skirt terminates in an
annular bead 29. The tubular wall or skirt 27 is formed so as to
define a plurality of six bulged portions 26 therein and the bulged
portions are constructed and arranged as shown in FIGS. 3 and 4.
During the process of forming the cap, sealing means in the form of
an annular thickness of compressible sealing means 25 is also
suitably bonded to the inside surface of such cap.
As seen at location F, the cap structure 22 is then placed in
telescoped relation concentrically around the right circular
cylindrical portion 13 of the container body 11 with the resilient
sealing means 25 engaging bead-like flange 30. The cap structure 22
and the container body 11 are held in axially compressed relation
between cooperating die means or dies 40 and 41 which operatively
associate with and engage the cap structure 22 and container body
11 respectively. The dies 40 and 41 have suitable cooperating
helical thread segment-defining means therein and are relatively
rotatable about a central axis 42 over a predetermined angle to
form the thread segments 21 in the cylindrical portion 13 and the
thread segments 23 in the cap structure 22 in a simultaneous
manner. Because of the simultaneous forming of the thread segments
21 and 23 by the dies 40 and 41 these thread segments are in
perfect threaded engagement while the sealing means 25 is also held
in fluid-tight compressed condition.
As explained earlier, the bulged portions 26 are formed in the cap
structure 22 during the separate forming of such cap. These bulged
portions 26 are suitably held within the dies 40 and 41 and the
helical thread segment-defining portions are also suitably
constructed and arranged so that the thread segments 21 and 23 are
defined in spaces around the cap 22 between the bulged portions
26.
The cooperating dies 40 and 41 are then moved apart and the
container construction is filled with an associated product and
such product, described herein as a carbonated beverage B, may be
introduced therein as illustrated at G through a suitable nozzle 43
or the like. The filling is achieved with the container
construction in an inverted position.
A bottom wall or closure 16 for the filled container construction
may be made using any suitable end closure forming machine. The
bottom wall 16 is suitably fixed on the container construction as
illustrated at H and any suitable apparatus such as a seaming or
mechanical flanging apparatus of known construction may be used for
this purpose whereby a fluid-tight bottom bead or chime 17 is
provided and the now filled and sealed container 10 is ready for
shipment.
The unique method of this invention enables the walls of container
10 to be made of a substantially uniform thickness throughout which
is compatible with the product to be contained therewithin. The
main body of such container is a seamless body having a thickness
which is controlled by the precision process of drawing and
ironing. Further, as illustrated at location C in FIG. 5, the
method steps employed are such that once the central portion 36 of
the transverse wall 35 is severed a substantial amount of thick
material is eliminated from the container body and such material is
material which is easily recycled and reused while the flange
portion 37 is further drawn and ironed. Thus, the overall cost of
the container 10 is kept at a minimum because it does not employ a
bottom wall of excessive thickness, inasmuch as the separately made
bottom wall 16 may be made of comparatively smaller thickness.
Although any suitable material may be used to define the various
components of container 10 such components are all preferably made
of the same material and such material may be in the form of a
metallic material which is preferably a metallic material
containing aluminum.
While present exemplary embodiments of this invention, and methods
of practicing the same, have been illustrated and described, it
will be recognized that this invention may be otherwise variously
embodied and practiced within the scope of the following
claims.
* * * * *